Incandescent gas-burner.



No. 629,285. Patented Julyw, |899.

{Application l'ad Feb. i6, 1899.)

UNITED STATES PATE-NT OFFICE.

lAUGUST BACI-IMEYER, OF LONDON, ENGLAND.

'INCANDESCENT GAS-BURNER.

SPECIFICATION forming' part 0f Letters Patent No. 629,285, dated July 18, 1899. Application tiled February 16, 1899. Serial No. 705,687. (No model.)

To all whom t may concern.'

Be it known that I, AUGUST BACHMEYER, a citizen of Germany, residing atI No. 78 York street, Westminster, London, England, have invented a certain new and useful Improvement in Incandescent Gas-Burners, (for which I have applied for a patent in Great Britain,

lvention and the best means I know of carrydated January 31, 1899, No. 2,17 9,) of which the following is a speciiication.

My invention relates to a construction of burner whereby I obtain an intimate mixture of air and gas in suitable proportions to produce a llame of great heating power especially adapted for heating to incandescence a refractory mantle for the purpose of producing brilliant light.

Figure 1 of the accompanying drawings is a vertical section of a burner according to this invention. Fig. 2 is an elevation.

a. is the inlet for gas, which issues in-one or'more jets directed upward.

b are the airinlets.

c is the mixing-tube, tapering to a-smaller diameter to the neck d, whence ascends a tube e, tapering to a larger diameter at the mouth, which is of annular form, surrounding a metallic core f. Into this core is screwed the stem of acap g, which iixes on the mouthv of the tube e an annular disk h of wire-gauze or perforated metal, or it may be a disk having its circumference serrated like a toothed wheel, the mixed gas and air issuing in jets through the passages between the teeth.

I find practically that the annular area at the top of the conical tube e should be about double the circular area at the neck d. It is desirable to make the height between the gasinlet a. and the base of the tube c adjustable to suit various pressures of gas-and also to make the height of the core f in the tube e adjustable. I therefore inclose the burner within a tubular casing lo, to which the tubes c and e are attached, this casing being fitted to slide vertically in the socket l of the base vand in the socket m of the upper part. The casing le may have perforations at its lower and upper part, through which air can circulate, as indicated by the arrows, this air being heated before it ascends to the space surrounding the flame.

Having thus described the nature of this in-A ing the same into practical effect, I claim- 1. A gas-burner, consisting of the upper and lower reversely-tapered tubes connected by a contracted neck, a base having air-inlet openings forl the passage of air to the lower tube, ages-inlet opening tothe latter, and a core suspended within the upper tube, and an extensible outer casing inclosin g said tubes, substantially as described.

2. A gas-burner, consisting of the upper l and lower reversely-tapered tubes connected by a contracted neck, a base having air and gas inlets, for supplying air and gas to the lower tube, a disk arranged at' the top of the upper tube and having air and gas passages and a core suspended from said disk within the upper tube andan extensible outer casing inclosing said tubes, substantially as described. Y

3. A gas-burner, consisting of the upper and lower tapering tubes connected by a contracted neck, a base having a socket and air and gas inlets for supplying airand gas to the lower tube, a disk arranged at the top of the upper tube, and having a socket, a core suspended from the disk lwithin the upper tube, and a tubular casing inclosin g the tubes' and slidable in the sockets of the said base andk disk, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit 

